Geocaching.com - The largest online community for Geocaching around the world http://www.geocaching.com
Educaching -Created by a homeschooling family to incorperate GPS into their curriculum; they sell their resources but have great links. http://educaching.com/educaching.html
http://education.usgs.gov/common/lessons/gps.html
Geocaching.com - The largest online community for Geocaching around the world
http://www.geocaching.com
http://educaching.com/educaching.html
GPS Information - A portal to everything GPS related
http://www.gpsinformation.net/
Geocacher University - Articles, tips and tricks about GPS in education.
http://geocacher-u.com/
GPS In Education
http://www.alicechristie.org/geocaching/index.html